US 12,142,699 B1
Solar cell and photovoltaic module
Wusong Tao, Zhejiang (CN); Zhendong Chen, Zhejiang (CN); Luchuang Wang, Zhejiang (CN); Changchun Peng, Zhejiang (CN); and Chi Zhang, Zhejiang (CN)
Assigned to ZHEJIANG JINKO SOLAR CO., LTD., Haining Zhejiang (CN)
Filed by ZHEJIANG JINKO SOLAR CO., LTD., Zhejiang (CN)
Filed on Dec. 29, 2023, as Appl. No. 18/401,297.
Claims priority of application No. 202311526407.3 (CN), filed on Nov. 16, 2023.
Int. Cl. H01L 31/0224 (2006.01); H01L 31/048 (2014.01)
CPC H01L 31/022433 (2013.01) [H01L 31/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A photovoltaic module, comprising:
a cell string including edge cells arranged close to edges of the photovoltaic module and a central cell, wherein each of the edge cells includes:
a substrate having a central region and two peripheral regions on two opposite sides of the central region, respectively; and
a plurality of finger electrodes arranged at intervals along a first direction and including first finger electrodes and second finger electrodes, wherein each of the two peripheral regions has at least two first finger electrodes in the first finger electrodes, and the second finger electrodes are arranged in the central region, wherein the plurality of finger electrodes are arranged on a surface of the substrate and each of the plurality of finger electrodes extends along a second direction, the central region and the two peripheral regions are arranged along the first direction, and a boundary between the central region and each of the two peripheral regions extends along the second direction;
wherein each of the first finger electrodes includes first body portions and first widened portions arranged alternatingly along the second direction, each of the second finger electrodes includes second body portions and second widened portions arranged alternatingly along the second direction, and the first widened portions are respectively aligned to the second widened portions along the first direction to form columns;
wherein each of the first widened portions of any of the first finger electrodes has a larger orthographic projection on the substrate than each of the second widened portions of any the second finger electrodes, each of the first widened portions of any the first finger electrodes has a larger orthographic projection on the substrate than each of the first body portions of any the first finger electrodes, each of the second widened portions of any the second finger electrodes has a larger orthographic projection on the substrate than each of the second body portions of any the second finger electrodes, and along the first direction, a respective first widened portion of either one of two first finger electrodes farthest from the central region has a larger orthographic projection on the substrate than a respective first widened portion of each of two first finger electrodes arranged closet to the central region;
a plurality of welding strips arranged at intervals along the second direction and extending along the first direction, wherein a respective welding strip in the plurality of welding strips is in contact and connected to the first widened portions and the second widened portions in a same respective column to connect two adjacent cells;
at least one encapsulation adhesive film configured to cover at least one cell string; and
at least one cover plate configured to cover the at least one encapsulation adhesive film,
wherein the edge cells include a first edge cell closest to the central cell and a second edge cell farthest away from the central cell, and wherein each of the first widened portions of each respective first finger electrode of the first edge cell has an orthographic projection on the substrate of the first edge cell that is smaller than an orthographic projection of each of the first widened portions of the first finger electrodes of the second edge cell on the substrate of the second edge cell.